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Phys Rev Lett. 2018 Feb 2;120(5):052503. doi: 10.1103/PhysRevLett.120.052503.

Light-Nuclei Spectra from Chiral Dynamics.

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Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Department of Physics, Old Dominion University, Norfolk, Virginia 23529, USA.
Department of Mathematics and Physics, University of Salento, 73100 Lecce, Italy.
INFN-Lecce, 73100 Lecce, Italy.
INFN-Pisa, 56127 Pisa, Italy.
INFN-Trento, 38050 Povo, Italy.
Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Department of Physics, University of Pisa, 56127 Pisa, Italy.
Theory Center, Jefferson Lab, Newport News, Virginia 23606, USA.


In recent years local chiral interactions have been derived and implemented in quantum Monte Carlo methods in order to test to what extent the chiral effective field theory framework impacts our knowledge of few- and many-body systems. In this Letter, we present Green's function Monte Carlo calculations of light nuclei based on the family of local two-body interactions presented by our group in a previous paper in conjunction with chiral three-body interactions fitted to bound- and scattering-state observables in the three-nucleon sector. These interactions include Δ intermediate states in their two-pion-exchange components. We obtain predictions for the energy levels and level ordering of nuclei in the mass range A=4-12, accurate to ≤2% of the binding energy, in very satisfactory agreement with experimental data.

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